package com.itheima.reggie.service.impl;

import cn.hutool.core.util.IdUtil;
import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.itheima.reggie.common.CustomException;
import com.itheima.reggie.common.ResultInfo;
import com.itheima.reggie.domain.Category;
import com.itheima.reggie.mapper.CategoryMapper;
import com.itheima.reggie.service.CategoryService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.List;

@Service
@Transactional
public class CategoryServiceImpl implements CategoryService {
    @Autowired
    private CategoryMapper categoryMapper;
    @Override
    public List<Category> findAll() {
        return categoryMapper.findAll();
    }

    @Override
    public void save(Category category) {
        long id= IdUtil.getSnowflake(1,1).nextId();
        category.setId(id);
        //category.setCreateTime(new Date());
        //category.setUpdateTime(new Date());
        //category.setUpdateUser(1L);
        //category.setCreateUser(1L);
        categoryMapper.save(category);
    }

    @Override
    public void update(Category category) {
        //category.setUpdateTime(new Date());
        //category.setUpdateUser(1L);
        categoryMapper.update(category);
    }

    @Override
    public ResultInfo delete(long id) {
        Integer num1=categoryMapper.countDishByCategoryId(id);
        if (num1>0){
            throw new CustomException("此分类下存在菜品，不允许删除");
        }

        Integer num2=categoryMapper.countSetmealByCategoryId(id);
        if (num2>0){
            throw new CustomException("此分类下存在套餐，不允许删除");
        }
        categoryMapper.delete(id);
        return ResultInfo.success(null);
    }

    @Override
    public List<Category> findByType(Integer type) {
        LambdaQueryWrapper<Category> wrapper = new LambdaQueryWrapper<Category>();
        wrapper.eq(Category::getType,type);
        return categoryMapper.selectList(wrapper);
    }
}
